import random
import csv
import datetime 

import sys

ROWS=10000000
COLS=15
with open('cov.txt','wt') as f:
    writer=csv.writer(f)
    for i in range(ROWS):
        row=[]
        for j in range(COLS):
            row.append(random.uniform(100, 10000))
        row.append(row[0]+row[1]+random.uniform(0, 100))
        row.append(row[2]+row[4]+random.uniform(0, 100))    
        row.append(row[3]+row[5]+random.uniform(0, 100))    
        row.append(row[12]+row[14]+random.uniform(0, 100))    
        row.append(row[13]+row[8]+random.uniform(0, 100))    
        writer.writerow(row)

